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Antietam Creek

Burnside's Bridge traversing Antietam Creek near Sharpsburg, Maryland, site of heavy combat during the Battle of Antietam (Sharpsburg) on September 17, 1862

Antietam Creek is a Script error: No such module "convert".[1] tributary of the Potomac River located in south central Pennsylvania and western Maryland in the United States, a region known as the Hagerstown Valley. The creek became famous as a focal point of the Battle of Antietam during the American Civil War.


The creek is formed in Franklin County, Pennsylvania, at the confluence of the West and East Branches of Antietam Creek, about Script error: No such module "convert". south of Waynesboro, Pennsylvania. Welty's Mill Bridge crosses the East Branch of Little Antietam at Washington Township in Franklin County, Pennsylvania. The stream runs for about Script error: No such module "convert". upon its entering Washington County, Maryland. The course proceeds southward in a meandering pattern, and the creek empties into the Potomac south of Sharpsburg.[2]

The watershed area is Script error: No such module "convert". and includes parts of Franklin County (106 mi2) and Washington County (185 mi2).[3]:3 Major tributaries in Pennsylvania include the East and West Branches, Red Run and Falls Creek. Major tributaries in Maryland include Little Antietam Creek, Beaver Creek, and Marsh Run. Communities in the watershed include Waynesboro in Pennsylvania; and Boonsboro, Funkstown, Hagerstown, Mount Aetna, Sharpsburg and Smithsburg in Maryland.


The middle bridge over Antietam Creek, also near Sharpsburg, photographed September 1862

The term "Antietam" is thought to be a derivative of an Algonquian phrase meaning "swift-flowing stream".[4]

The creek is noted for numerous well-preserved stone arch bridges dating to the 19th century that still traverse the creek, the most famous of which is the Script error: No such module "convert". Burnside's Bridge in the Antietam National Battlefield.

The creek was a major topographic feature during the Battle of Antietam (called the Battle of Sharpsburg in the American South), fought on September 17, 1862, near Sharpsburg. Burnside's Bridge became a major focus of combat as Union forces under General Ambrose Burnside repeatedly tried to capture the bridge from Confederate forces guarding the crossing from a high bluff overlooking the creek. The day of the battle is known as "the day Antietam Creek ran red" due to the blood of thousands of Union casualties mixing with the creek waters.

Development and water quality issues

Most of the watershed area is relatively rural in nature, but the area surrounding Hagerstown is threatened by urban sprawl. The area is also heavily cultivated, and waste runoff from farms is a growing water quality concern. The Maryland Department of the Environment (MDE) has identified farm runoff as the largest source of sediment (loose soil) in Antietam Creek and its tributaries. The second largest source is urban runoff.[3]:11 MDE recommends that farmers implement best management practices on their lands to control runoff, such as installing riparian buffers.[3]:34

See also


  1. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed August 15, 2011
  2. ^ United States Geological Survey. Reston, VA. "Antietam Creek." Geographic Names Information System (GNIS). Accessed 2010-04-27.
  3. ^ a b c Maryland Department of the Environment. Baltimore, MD (2008). "Total Maximum Daily Load of Sediment in the Antietam Creek Watershed, Washington County, Maryland." 2008-08-11.
  4. ^ "Antietam". Online Etymology Dictionary. Retrieved 4 April 2011. 

External links

Coordinates: 39°25′02″N 77°44′44″W / 39.4173220°N 77.7455486°W / 39.4173220; -77.7455486{{#coordinates:39.4173220|-77.7455486||||||| |primary |name= }}